Maryland State Police say four suspects passed counterfeit $100 poker chips on at least two occasions at the Maryland Live! Casino in Anne Arundel County.

A Fairfax County couple is accused of passing thousands of dollars in counterfeit poker chips at a Maryland casino.

The husband and wife were arrested after an investigation in which authorities recovered more than $100,000 in fake poker chips floating in a lake, according to Maryland State Police.

Rosa A. Nguyen, 36, and her husband, Vuong Q. Truong, 37, both of Annandale, are charged with theft between $1,000 and $10,000, and multiple counts of conspiracy to committing a theft scheme.

Police said they are also looking for another couple involved in the scheme.

The investigation began Jan. 20, when Maryland Live! Casino officials in Hanover reported the bogus chips being used in the casino. Casino officials said they had descriptions of four suspects who had passed counterfeit $100 poker chips on two occasions.

Further investigation revealed Rosa Nguyen allegedly purchased $150,000 worth of counterfeit casino chips over the Internet for $12,000, police said The chips were then altered to appear similar to Maryland Live! Casino chips, police said.

Investigators learned that many of the counterfeit chips had been discarded in Lake Accotink, in Springfield, not far from the suspects’ home.

“Fortunately for police, the chips floated,” a Maryland State Police spokesman said in a release. Investigators were able to find about $115,000 worth of the counterfeit casino chips in the lake.

Police are seeking charges against two other suspects in an unrelated case of fraudulent chip use at Maryland Live!

Investigators believe these two suspects, a boyfriend and girlfriend also from Northern Virginia, obtained $1 chips from a West Virginia casino and altered them to appear as $100 chips from Maryland Live!